docs(angular/overview): guard the error with 'isError()', rename the 'Response' interface to 'Repo', and remove the unused 'CommonModule' import

[sukvvon]

🎯 Changes

Align the Angular overview example with the simple example it links to:

• Guard the error branch with isError() instead of error(). Reading error().message inside @if (error()) does not narrow the second call, so the template failed to compile with strictTemplates (TS2531: Object is possibly 'null').
• Rename the local Response interface to Repo, so it does not shadow the global Response type.
• Remove the unused CommonModule import.

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested code changes locally with pnpm run test:pr, or these tests do not apply to this pull request.
• I have followed the AI contribution policy and fully understand the code in this pull request, including any code generated with AI assistance.

🚀 Release Impact

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• This change is docs/CI/dev-only (no release).

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☁️ Nx Cloud last updated this comment at 2026-10-20 03:05:51 UTC

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size-limit report 📦

Path	Size
react full	11.76 KB (0%)
react minimal	8.59 KB (0%)

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• docs/framework/angular/overview.md

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| This is Sparta! And I'm here to kick bugs into the pit of doom. |
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